/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * This program and the accompanying materials are made available under the
 * terms of the The MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 */
#pragma once

// This file contains bit definitions for the HD44780 and compatible
// LCD controllers.  They are used by most drivers in this (LCD)
// library, though the SSD controllers only seem to make use of the
// LCD_DATA and LCD_CMD values.
//
// Those values (DATA, CMD) are specific to the implementation of the
// i2C expander in use, so may not be appropriate for inclusion into
// this file.  But for now, we will leave them here.

#include <stdint.h>

namespace upm
{
// commands
  const uint8_t LCD_CLEARDISPLAY = 0x01;
  const uint8_t LCD_RETURNHOME = 0x02;
  const uint8_t LCD_ENTRYMODESET = 0x04;
  const uint8_t LCD_DISPLAYCONTROL = 0x08;
  const uint8_t LCD_CURSORSHIFT = 0x10;
  const uint8_t LCD_FUNCTIONSET = 0x20;

  const uint8_t LCD_BACKLIGHT = 0x08;
  const uint8_t LCD_NOBACKLIGHT = 0x00;
  
  // flags for display entry mode
  const uint8_t LCD_ENTRYRIGHT = 0x00;
  const uint8_t LCD_ENTRYLEFT = 0x02;
  const uint8_t LCD_ENTRYSHIFTINCREMENT = 0x01;
  const uint8_t LCD_ENTRYSHIFTDECREMENT = 0x00;
  
  // flags for display on/off control
  const uint8_t LCD_DISPLAYON = 0x04;
  const uint8_t LCD_DISPLAYOFF = 0x00;
  const uint8_t LCD_CURSORON = 0x02;
  const uint8_t LCD_CURSOROFF = 0x00;
  const uint8_t LCD_BLINKON = 0x01;
  const uint8_t LCD_BLINKOFF = 0x00;
  
  // flags for display/cursor shift
  const uint8_t LCD_DISPLAYMOVE = 0x08;
  const uint8_t LCD_MOVERIGHT = 0x04;
  const uint8_t LCD_MOVELEFT = 0x00;
  
  // flags for function set
  const uint8_t LCD_8BITMODE = 0x10;
  const uint8_t LCD_4BITMODE = 0x00;
  const uint8_t LCD_2LINE = 0x08;
  const uint8_t LCD_1LINE = 0x00;
  const uint8_t LCD_5x10DOTS = 0x04;
  const uint8_t LCD_5x8DOTS = 0x00;
  
  // flags for CGRAM
  const uint8_t LCD_SETCGRAMADDR = 0x40;
  
  // may be implementation specific
  const uint8_t LCD_EN = 0x04; // Enable bit
  const uint8_t LCD_RW = 0x02; // Read/Write bit
  const uint8_t LCD_RS = 0x01; // Register select bit
  const uint8_t LCD_DATA = 0x40;
  const uint8_t LCD_CMD = 0x80;
}
